Detection Performance of Wireless Sensor Networks with Multiple Antennas in Fading Channels

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  • The problem of distributed detection and decision fusion in wireless sensor networks (WSNs) is revisited. The detection performance of a WSN is inherently limited by the wireless propagation environment. The fusion of decisions forwarded by each sensor is subject to Nakagami-m fading which can represent a wide variety of wireless propagation environments. As wireless fading adversely affects the detection performance of any WSN, effective measures to mitigate its impact are needed. Motivated by the benefits of multiple antennas in wireless communications networks in reducing the impact of fading, the integration of multiple antennas at the sensor nodes is considered in this project to improve the detection performance of the WSN. An analytical expression for the optimal log-likelihood ratio (LLR) based fusion rule with multiple antenna based sensor nodes is derived. (As cited in abstract.)

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    Attribution-NonCommercial 4.0 International